What is "field balm"

n. trailing European aromatic plant of the mint family having rounded leaves and small purplish flowers often grown in hanging baskets; naturalized in North America; sometimes placed in genus Nepeta [syn: ground ivy, alehoof, gill-over-the-ground, runaway robin, Glechoma hederaceae, Nepeta hederaceae]

low-growing strongly aromatic perennial herb of southern Europe to GB naturalized in United States [syn: lesser calamint, Calamintha nepeta, Calamintha nepeta glantulosa, Satureja nepeta, Satureja calamintha glandulosa]